Men's 5000m: The journey to the limit

　　In athletics, the men's 5,000m event is an epic of endurance and perseverance. This is a comprehensive test of the athletes' physical fitness, psychological quality and tactical wisdom, and the men's 5000m athletes measure the distance between challenge and breakthrough with their feet.

　　The men's 5,000m event places high demands on the athletes' physical abilities. Hemoglobin, for example, is primarily responsible for transporting oxygen and carbon dioxide and is involved in the regulation of acid-base balance in the body, which is especially critical for endurance athletes. Generally, the normal value of hemoglobin in men ranges from 12 grams to 16 grams, and athletes are affected by nutrition, exercise load and other factors during training. If the anemia is lower than normal, the supply of oxygen and nutrients is insufficient, and the ability to work will be reduced; High Hb values and increased number and hematocrit in the blood can also cause problems. There is also a blood urea index, during normal physiological activities, urea production and excretion are balanced, blood urea concentration is relatively stable, and the blood urea concentration is high due to the impact of training on protein metabolism when athletes are at rest, which is 5.7 - 7mmol/L. The change of blood urea content during exercise is closely related to the amount and intensity of exercise, and the blood urea value in the morning can reflect the recovery after exercise and evaluate the functional status of athletes.

　　Scientific training is the key to improving the performance of men's 5000m athletes. For example, in the men's 5000m final of a college games, Xu Zhenwei and Lv Jiawei of the first group led the whole process. Hui Zhenwei sprinted to win the championship in the final half lap, but Lu Jiawei was overtaken by poor rhythm. This highlights the importance of rational distribution of physical strength and mastery of rhythm. The coach will develop a personalized training plan based on the athlete's physical indicators and characteristics, including aerobic endurance training, interval training, etc. Aerobic endurance training improves athletes' cardiopulmonary function and lays the foundation for long-distance running; Interval training alternates high-intensity, short-term exercise with rest to improve speed, endurance and recovery.

　　Psychological quality is also indispensable. The 5,000m race is a long race, and athletes face both physical fatigue and psychological stress. For example, in an important event, athlete Xiao Zhang felt unbearable pain in his abdominal muscles during the competition, but his desire to win allowed him to overcome the difficulties. This mental toughness allows athletes to push their limits when it matters most.

　　The men's 5000m athletes continue to surpass themselves in the challenge, and they run hard towards higher, faster and stronger goals in the tempering of their physical fitness, training and psychology, and write their own glorious chapter.